Optical disk drive comprising dust removing apparatus

ABSTRACT

An optical disk drive, which includes a main frame, an upper case coupled to an upper portion of the main frame, a tray slidably installed on the main frame, having a door, and adapted to carry a disk, and a front panel coupled to a front end portion of the main frame and having an aperture through which the tray passes, including an air discharging passage between the main frame and the front panel to discharge air and dust introduced into the optical disk drive through a gap between the door and the front panel to an outside of the optical disk drive.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority of Korean Patent Application No.2004-25686, filed on Apr. 14, 2004, in the Korean Intellectual PropertyOffice, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an optical disk drive, and moreparticularly, to an optical disk drive having a dust removing apparatus,which minimizes the amount of dust introduced into the optical diskdrive and collects dust floating inside the optical disk drive.

2. Description of Related Art

In general, an optical disk drive is a device that reproduces recordedinformation or records information by emitting light to a disk-shapedrecording medium, such as a compact disk (CD) and a digital video disk(DVD).

FIG. 1 is a perspective view of a conventional optical disk drive, andFIG. 2 is a partial sectional view of the conventional optical diskdrive shown in FIG. 1.

Referring to FIGS. 1 and 2, an optical disk drive includes a main frame10, an upper case 70 which is coupled to an upper portion of the mainframe 10, a tray 60 which carries a disk D into the disk drive, and anoptical pickup 50 which records information on the disk D or reproducesinformation recorded on the disk D. A disk receiving surface 62 in whichthe disk D is received is formed on a top surface of the tray 60. A door61 is coupled to a front end portion of the tray 60. An opening 63through which the optical pickup 50 accesses the disk D is formed in thetray 60. A front panel 15 is coupled to a front end portion of the mainframe 10. An aperture 16 through which the tray 60 passes is formed inthe front panel 15.

The disk D carried by the tray 60 is mounted on a turntable 40 that isinstalled on an upper portion of a spindle motor 30. The turntable 40 iscoupled to a rotational shaft (not shown) of the spindle motor 30 suchthat the turntable 40 is rotated by the rotational shaft of the spindlemotor 30 to rotate the disk D. The spindle motor 30 is installed on apickup deck 20 that is coupled to the main frame 10. Further, theoptical pickup 50 is installed on the pickup deck 20 to move in a radialdirection of the disk D.

As shown in FIG. 2, when the tray 60 is inserted into the disk drive,there exists a gap between the door 61 of the tray 60 and the frontpanel 15. Foreign substances, such as external dust, are introduced intothe disk drive through the gap. The foreign substances introduced intothe disk drive may contaminate the disk D when they attach to a surfaceof the disk D and may deteriorate the performance of the optical pickup50 when they attach to a lens of the optical pickup 50.

BRIEF SUMMARY

Embodiments of the present invention provides an optical disk driveincluding a dust removing apparatus, which can minimize the amount ofdust introduced into the optical disk drive and collect dust floatinginside the optical disk drive.

According to an aspect of the present invention, there is provided anoptical disk drive, which includes a main frame, an upper case coupledto an upper portion of the main frame, a tray slidably installed on themain frame, having a door, and adapted to carry a disk, and a frontpanel coupled to a front end portion of the main frame and having anaperture through which the tray passes, including an air dischargingpassage between the main frame and the front panel to discharge air anddust introduced into the optical disk drive through a gap between thedoor and the front panel to an outside of the optical disk drive.

The air discharging passage may have an inlet which is opened toward arear surface of the door to communicate with the gap, and an outlet,which is opened toward a bottom of the optical disk drive to allow theair discharging passage to communicate with the outside of the opticaldisk drive.

A dust adsorbing filter may be attached to an inner wall surface of theair discharging passage and adsorb and collect dust contained in airpassing through the air discharging passage. In this case, the airdischarging passage may have a recessed portion formed thereon, and thedust adsorbing filter may be attached to an inner wall surface of therecessed portion.

According to another aspect of the present invention, there is providedan optical disk drive, which includes a main frame, an upper casecoupled to an upper portion of the main frame, and a tray slidablyinstalled on the main frame to carry a disk, including a plurality ofprojections arranged on at least a top surface of the tray to removedust contained in air flowing inside the optical disk drive.

The projections may be arranged on a top surface of a rear end portionof the tray, or top and bottom surfaces of the rear end portion of thetray.

The projections may have a square-pillar shape, and may be integrallyformed with the tray.

According to still another aspect of the present invention, there isprovided an optical disk drive, which includes a main frame, an uppercase coupled to an upper portion of the main frame, and a tray slidablyinstalled on the main frame and adapted to carry a disk, the opticaldisk drive including a dust adsorbing filter attached to at least one ofa top surface of the tray, a bottom surface of the tray, and a bottomsurface of the upper case and adapted to adsorb and collect dustcontained in air flowing inside the optical disk.

The dust adsorbing filter may be attached to at least a top surface or abottom surface of a rear end portion of the tray, or the bottom surfaceof the upper case.

The optical disk drive may further comprise an air guide disposed on atleast one of the top and bottom surfaces of the tray and the bottomsurface of the upper case and adapted to guide air flowing due to therotation of the disk toward the dust adsorbing filter.

The air guide may be disposed on at least the top surface of the top andbottom surfaces of the tray, and may be integrally formed with the tray.

The air guide may protrude from the bottom surface of the upper case bya specified height toward the tray. In this case, the air guide may beintegrally formed with the upper case.

The air guide may be made of a porous filtering material.

According to another aspect of the present invention, there is providedan optical disk drive including: a frame; an upper case coupled to anupper portion of the frame; a tray slidably installed on the frame,having a door, and adapted to carry a disk; a front panel coupled to afront end portion of the frame and having an aperture through which thetray passes; an air discharging passage between the frame and the frontpanel to discharge to an outside of the optical disk drive air and dustintroduced into the optical disk drive through a gap between the doorand the front panel; and a plurality of projections arranged on at leasta top surface of the tray to remove dust contained in air flowing insidethe optical disk drive.

According to another aspect of the present invention, there is providedan optical disk drive including: a frame; an upper case coupled to anupper portion of the frame; a tray slidably installed on the frame,having a door, and adapted to carry a disk; a front panel coupled to afront end portion of the frame and having an aperture through which thetray passes; an air discharging passage between the frame and the frontpanel to discharge to an outside of the optical disk drive air and dustintroduced into the optical disk drive through a gap between the doorand the front panel; and a dust adsorbing filter attached to at leastone of a top surface of the tray, a bottom surface of the tray, and abottom surface of the upper case and adapted to adsorb and collect dustcontained in air flowing inside the optical disk.

Additional and/or other aspects and advantages of the present inventionwill be set forth in part in the description which follows and, in part,will be obvious from the description, or may be learned by practice ofthe invention.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the present invention willbecome apparent and more readily appreciated from the following detaileddescription, taken in conjunction with the accompanying drawings ofwhich:

FIG. 1 is a perspective view of a conventional optical disk drive;

FIG. 2 is a partial sectional view of the conventional optical diskdrive shown in FIG. 1;

FIG. 3 is a perspective view of an optical disk drive including a dustremoving apparatus according to an exemplary embodiment of the presentinvention;

FIG. 4 is a partial sectional view of the optical disk drive shown inFIG. 3;

FIG. 5 is an enlarged perspective view of a tray and a disk forexplaining operations of projections and an air guide shown in FIG. 3;

FIG. 6 is a sectional view illustrating air flow around the projectionsfor explaining the operations of the projections and the air guide shownin FIG. 3;

FIG. 7 is a perspective view of an example of the projections and theair guide shown in FIG. 3;

FIG. 8 is a perspective view of another example of the air guide shownin FIG. 3;

FIG. 9 is a perspective view of still another example of the projectionsand the air guide shown in FIG. 3;

FIG. 10 is a perspective view of an optical disk drive including a dustremoving apparatus according to another exemplary embodiment of thepresent invention;

FIG. 11 is a perspective view of an example of a dust adsorbing filterand an air guide shown in FIG. 10; and

FIG. 12 is a perspective view of another example of the dust adsorbingfilter and the air guide shown in FIG. 10.

DETAILED DESCRIPTION OF EMBODIMENTS

Reference will now be made in detail to embodiments of the presentinvention, examples of which are illustrated in the accompanyingdrawings, wherein like reference numerals refer to the like elementsthroughout. The embodiments are described below in order to explain thepresent invention by referring to the figures.

FIG. 3 is a perspective view of an optical disk drive comprising a dustremoving apparatus according to an exemplary embodiment of the presentinvention, and FIG. 4 is a partial sectional view of a front end portionof the optical disk drive shown in FIG. 3.

Referring to FIGS. 3 and 4, an optical disk drive includes a main frame110, and an upper case 170 coupled to an upper portion of the main frame110. A tray 160 is slidably installed on the main frame 110 and carriesa disk D into the disk drive. The main frame 110 is coupled to aturntable 140 on which the disk D carried by the tray 160 is mounted, aspindle motor 130 which rotates the turntable 140, and a pickup deck 120which supports an optical pickup 150 for recording information on thedisk D or reproducing information recorded on the disk D. An end portionof the pickup deck 120 is hinged on the main frame 110 so that thespindle motor 130 and the turntable 140 can be raised and lowered. Theturntable 140 is coupled to a rotational shaft of the spindle motor 130such that the turntable 140 is rotated by the rotational shaft of thespindle motor 130 to rotate the disk D. A front panel 115 is coupled toa front end portion of the main frame 110, and an aperture 116 throughwhich the tray 160 passes is formed in the front panel 115.

According to the present embodiment, the optical disk drive is providedwith a dust removing apparatus. To this end, as shown in FIG. 4, an airdischarging passage 181 is formed between the main frame 110 and thefront panel 115 to discharge air introduced into the optical disk drivethrough a gap G between a door 161 of the tray 160 and the front panel115. An inlet 181 a of the air discharging passage 181 communicates withthe gap G, and an outlet 181 b of the air discharging passage 181communicates with the outside of the disk drive. In detail, the inlet181 a of the air discharging passage 181 is opened toward a rear surfaceof the door 161, and the outlet 181 b of the air discharging passage isopened toward a bottom of the disk drive.

In the above structure, most of air introduced into the disk drivethrough the gap G between the door 161 of the tray 160 and the frontpanel 115 is discharged to the outside of the disk drive through the airdischarging passage 181. At this time, since foreign substances, such asdust, contained in the air are also discharged to the outside of thedisk drive through the air discharging passage 181, the amount of dustintroduced into the disk drive can be minimized. Accordingly,contamination of the disk D and performance deterioration of the opticalpickup 150, which may be caused due to the dust, can be prevented.

The optical disk drive is generally housed in a computer. Accordingly,the dust contained in the air discharged through the air dischargingpassage 181 should be prevented from entering the computer. To this end,a dust adsorbing filter 183 may be attached to an inner wall surface ofthe air discharging passage 181. The dust adsorbing filter 183 adsorbsand collects the dust contained in the air passing through the airdischarging passage 181. The air discharging passage 181 has a recessedportion 182 formed thereon, and the dust adsorbing filter 183 may beattached to an inner wall surface of the recessed portion 182. Therecessed portion 182 reduces a speed of the air passing through the airdischarging passage 181 to help the dust adsorbing filter 183 to collectthe dust contained in the air.

The optical disk drive including the dust removing apparatus accordingto the present embodiment may further include a plurality of projections191, as shown in FIG. 3, which are arranged on a top surface of the tray160 and remove dust contained in air flowing inside the disk drive. Adisk receiving surface 162 in which the disk D is received is formed onthe top surface of the tray 160, and the door 161 is coupled to a frontend portion of the tray 160. Further, an opening 163 is formed in thetray 160 such that the optical pickup 150 accesses the disk D throughthe opening 163. Accordingly, the projections 191 can be formed on anyportions of the top surface of the tray 160 other than the diskreceiving surface 162 and the opening 163. The projections 191 may beformed on a portion where is relatively large, flat, and less affectedby dust, e.g., on a top surface of a rear end portion of the tray 160.However, the present embodiment is not restricted thereto, but theprojections 191 can be formed on a top surface of the front end portionof the tray 160.

The projections 191 may have various shapes, such as a square-pillarshape and a cylindrical shape. The square-pillar shape as shown in thedrawings performs well because the projections with those shapes canform turbulence more easily, which will be explained later. Theprojections 191 may be as high as possible unless the projections 191cause an interference with other elements when the tray 160 is movedinto and out of the disk drive. The projections 191 do not need to bearranged regularly, but can be arranged irregularly as shown in thedrawings. Further, the projections 191 may be integrally formed with thetray 160 when the tray 160 is manufactured by plastic injection molding.Meanwhile, the projections 191 may be attached as a separate member tothe top surface of the tray 160.

An air guide 195 may be disposed on the top surface of the tray 160 toguide air flowing due to the rotation of the disk D toward theprojections 191. The air guide 195 may have a long bar shape, and may beas high as possible unless the air guide 195 causes an interference withother elements, like the projections 191. The air guide 195 may beintegrally formed with the tray 160, or may be attached as a separatemember to the top surface of the tray 160, like the projections 191.

FIGS. 5 and 6 are diagrams for explaining operations of the projectionsand the air guide shown in FIG. 3. Specifically, FIG. 5 is an enlargedperspective view of the tray and the disk, and FIG. 6 is a sectionalview illustrating air flow around the projections.

Referring to FIGS. 5 and 6, if the disk D mounted on the turntable 140begins to rotate in an arrow direction A, air begins to flow in the samedirection as the rotational direction of the disk D. The flowing air isguided by the air guide 195 to pass through the area where theprojections 191 are arranged. As shown in FIG. 6, while the flowing aircrosses over the projections 191, turbulence is formed behind theprojections 191. Foreign substances, such as dust, contained in the airare accumulated behind the projections 191 due to the turbulence.Accordingly, since the amount of dust contained in the air passingthrough the area where the projections 191 are arranged is reducedconsiderably, conventional problems of contamination of the disk D orperformance deterioration of the optical pickup 150, which may be causedwhen the dust contained in the flowing air floats inside the disk drive,can be prevented.

FIG. 7 is a perspective view of an example of the projections and theair guide shown in FIG. 3.

Referring to FIG. 7, the projections 191 and the air guide 195 may bedisposed on a bottom surface of the tray 160 as well as the top surfaceof the tray 160. The projections 191 and the air guide 195 formed on thebottom surface of the tray 160 remove dust contained in air flowingunder the tray 160.

FIG. 8 is a perspective view of another example of the air guide shownin FIG. 3.

Referring to FIG. 8, an air guide 195′ may be formed on the upper case170. That is, the air guide 195′ protrudes from a bottom surface of theupper case 170 by a specified height toward the tray 160. The air guide195′ guides air flowing due to the rotation of the disk D toward theprojections 191 arranged on the top surface of the tray 160. The uppercase 170 is generally manufactured by pressing a metal plate, such as astainless steel plate. The air guide 195′ may be integrally formed withthe upper case 170 when the upper case 170 is manufactured by pressing.In the meantime, the air guide 195′ may be attached as a separate memberto the bottom surface of the upper case 170.

FIG. 9 is a perspective view of still another example of the projectionsand the air guide shown in FIG. 3.

Referring to FIG. 9, an air guide 195″ guiding flowing air toward theprojections 191 may be made of a porous filtering material, such assponge. The air guide 195″ made of the filtering material may beattached to the top surface of the tray 160 using an adhesive or thelike. A dust adsorbing filter 192 may be attached to a surface of eachof the projections 191.

In the above structure, the air guide 195″ not only guides the flowingair toward the projections 191 but also filters dust contained in theflowing air. Since the dust adsorbing filter 192 adsorbs and collectsthe dust contained in the flowing air as well, the efficiency incollecting and removing dust can be improved.

The example shown in FIG. 9 can be applied to the examples shown inFIGS. 7 and 8.

FIG. 10 is a perspective view of an optical disk drive including a dustremoving apparatus according to another embodiment of the presentinvention.

Referring to FIG. 10, an optical disk drive includes a dust adsorbingfilter 297, which is attached to a top surface of the tray 160 andadsorbs dust contained in air flowing inside the disk drive. The dustadsorbing filter 297 can be attached to the top surface of the tray 160using a specified adhesive. The dust adsorbing filter 297 can bedisposed on any portions of the top surface of the tray 160 other thanthe disk receiving surface 162 and the opening 163. The dust adsorbingfilter 297 may be disposed on a portion, which is relatively large,flat, and less affected by dust, e.g., a top surface of a rear endportion of the tray 160. However, the present embodiment is notrestricted thereto, but the dust adsorbing filter 297 can be disposed ona top surface of a front end portion of the tray 160.

An air guide 295 may be disposed on the top surface of the tray 160 toguide air flowing due to the rotation of the disk D toward the dustadsorbing filter 297. The air guide 295 may have a long bar shape, andmay be as high as possible unless the air guide 295 causes aninterference with other elements. The air guide 295 may be integrallyformed with the tray 160, and also may be attached as a separate memberto the top surface of the tray 160. Further, the air guide 295 may bemade of a porous filtering material, such as sponge, as explained above.In this case, the air guide 295 filters the dust contained in theflowing air by itself.

If the disk D mounted on the turntable 140 begins to rotate in an arrowdirection A, air begins to flow in the same direction as the rotationaldirection of the disk D. The flowing air is guided by the air guide 295to pass an area where the dust adsorbing filter 297 is disposed. Duringthis procedure, the dust contained in the flowing air is adsorbed by thedust adsorbing filter 297 to be removed from the flowing air.Accordingly, the amount of dust contained in the air passing through thearea where the dust adsorbing filter 297 is disposed is reducedconsiderably.

FIG. 11 is a perspective view of an example of the dust adsorbing filterand the air guide shown in FIG. 10.

Referring to FIG. 11, the dust adsorbing filter 297 and the air guide295 may be disposed on a bottom surface of the tray 160 as well as thetop surface of the tray 160. The dust adsorbing filter 297 and the airguide 295 disposed on the bottom surface of the tray 160 adsorb dustcontained in air flowing under the tray 160.

FIG. 12 is a perspective view of another example of the dust adsorbingfilter and the air guide shown in FIG. 10.

Referring to FIG. 12, a dust adsorbing filter 297′ and an air guide 295′may be disposed on the upper case 170. That is, the dust adsorbingfilter 297′ is attached to a bottom surface of the upper case 170, andthe air guide 295′ protrudes from the bottom surface of the upper case170 by a specified height toward the tray 160. The air guide 295′ may beintegrally formed with the upper case 170 when the upper case 170 ismanufactured by pressing. The air guide 295′ may be made of a porousfiltering material, such as sponge, and in this case, the air guide 295′may be attached to the bottom surface of the upper case 170 using anadhesive.

The optical disk drive comprising the dust removing apparatus accordingto the described embodiments of the present invention can minimize theamount of foreign substances, such as external dust, introduced into thedisk drive, and collect and remove dust floating inside the disk drive,thereby preventing the performance of the optical pickup fromdecreasing.

Although a few embodiments of the present invention have been shown anddescribed, the present invention is not limited to the describedembodiments. Instead, it would be appreciated by those skilled in theart that changes may be made to these embodiments without departing fromthe principles and spirit of the invention, the scope of which isdefined by the claims and their equivalents.

1. An optical disk drive, which includes a main frame, an upper casecoupled to an upper portion of the main frame, a tray slidably installedon the main frame, having a door, and adapted to carry a disk, and afront panel coupled to a front end portion of the main frame and havingan aperture through which the tray passes, the optical disk drivecomprising: an air discharging passage between the main frame and thefront panel to discharge air and dust introduced into the optical diskdrive through a gap between the door and the front panel to an outsideof the optical disk drive.
 2. The optical disk drive of claim 1, whereinthe air discharging passage has an inlet which is opened toward a rearsurface of the door to communicate with the gap, and an outlet, which isopened toward a bottom of the optical disk drive to allow the airdischarging passage to communicate with the outside of the optical diskdrive.
 3. The optical disk drive of claim 2, wherein most of airintroduced into the disk drive through the gap is discharged to theoutside of the disk drive through the air discharging passage.
 4. Theoptical disk drive of claim 1, wherein a dust adsorbing filter isattached to an inner wall surface of the air discharging passage toadsorb and/or collect dust contained in air passing through the airdischarging passage.
 5. The optical disk drive of claim 4, wherein theair discharging passage has a recessed portion formed thereon, and thedust adsorbing filter is attached to an inner wall surface of therecessed portion.
 6. The optical disk drive of claim 5, wherein therecessed portion reduces a speed of the air passing through the airdischarging passage.
 7. The optical disk drive of claim 1, furthercomprising a plurality of projections arranged on at least a top surfaceof the tray to remove dust contained in air flowing inside the opticaldisk drive.
 8. The optical disk drive of claim 7, further comprising anair guide disposed on at least one of a top surface of the tray, abottom surface of the tray, and a bottom surface of the upper case toguide air flowing due to the rotation of the disk toward theprojections.
 9. The optical disk drive of claim 8, wherein the air guidehas a bar shape.
 10. The optical disk drive of claim 8, wherein the airguide extends outward by a height as great as possible without causinginterference with other elements when the tray is moved
 11. The opticaldisk drive of claim 8, wherein the air guide is integrally formed withthe tray.
 12. An optical disk drive, which includes a main frame, anupper case coupled to an upper portion of the main frame, and a trayslidably installed on the main frame to carry a disk, the optical diskdrive comprising: a plurality of projections arranged on at least a topsurface of the tray to remove dust contained in air flowing inside theoptical disk drive.
 13. The optical disk drive of claim 12, wherein theprojections are arranged on a top surface of a rear end portion of thetray.
 14. The optical disk drive of claim 12, wherein the projectionsare also arranged a bottom surface of a rear end portion of the tray.15. The optical drive of claim 14, wherein the projections are formed ona top surface of the front end portion of the tray.
 16. The optical diskdrive of claim 12, wherein the projections have a square-pillar shape.17. The optical drive of claim 12, wherein the projections have acylindrical shape.
 18. The optical disk of claim 12, wherein theprojections extend from tray by a height as great as possible withoutcausing interference with other elements when the tray is moved.
 19. Theoptical disk of claim 12, wherein the projections are arrangedirregularly.
 20. The optical disk drive of claim 12, wherein theprojections are integrally formed with the tray.
 21. The optical diskdrive of claim 12, wherein a dust adsorbing filter is attached to asurface of each of the projections to adsorb and/or collect dustcontained in air passing through an area where the projections arearranged.
 22. The optical disk drive of claim 12, further comprising anair guide disposed on at least one of top surface of the tray, a bottomsurface of the tray, and a bottom surface of the upper case to guide airflowing due to the rotation of the disk toward the projections.
 23. Theoptical disk drive of claim 22, wherein the air guide is disposed on thetop surface of the tray.
 24. The optical disk drive of claim 23, whereinthe air guide is integrally formed with the tray.
 25. The optical diskdrive of claim 22, wherein the air guide protrudes from the bottomsurface of the upper case by a specified height toward the tray.
 26. Theoptical disk drive of claim 25, wherein the air guide is integrallyformed with the upper case.
 27. The optical disk drive of claim 22,wherein the air guide is made of a porous filtering material.
 28. Anoptical disk drive, which includes a main frame, an upper case coupledto an upper portion of the main frame, and a tray slidably installed onthe main frame and adapted to carry a disk, the optical disk drivecomprising: a dust adsorbing filter attached to at least one of a topsurface of the tray, a bottom surface of the tray, and a bottom surfaceof the upper case and adapted to adsorb and collect dust contained inair flowing inside the optical disk.
 29. The optical disk drive of claim28, wherein the dust adsorbing filter is attached to at least one of atop surface or a bottom surface of a rear end portion of the tray. 30.The optical disk drive of claim 28, wherein the dust adsorbing filter isattached to the bottom surface of the upper case.
 31. The optical diskdrive of claim 28, further comprising an air guide disposed on at leastone of the top surface of the tray, the bottom surface of the tray, andthe bottom surface of the upper case to guide air flowing due to therotation of the disk toward the dust adsorbing filter.
 32. The opticaldisk drive of claim 31, wherein the air guide is disposed on at leastone of the top surface of the top and bottom surfaces of the tray. 33.The optical disk drive of claim 32, wherein the air guide is integrallyformed with the tray.
 34. The optical disk drive of claim 31, whereinthe air guide protrudes from the bottom surface of the upper case by aspecified height toward the tray.
 35. The optical disk drive of claim34, wherein the air guide is integrally formed with the upper case. 36.The optical disk drive of claim 31, wherein the air guide is made of aporous filtering material.
 37. An optical disk drive comprising: aframe; an upper case coupled to an upper portion of the frame; a trayslidably installed on the frame, having a door, and adapted to carry adisk; a front panel coupled to a front end portion of the frame andhaving an aperture through which the tray passes; an air dischargingpassage between the frame and the front panel to discharge to an outsideof the optical disk drive air and dust introduced into the optical diskdrive through a gap between the door and the front panel; and aplurality of projections arranged on at least a top surface of the trayto remove dust contained in air flowing inside the optical disk drive.38. An optical disk drive comprising: a frame; an upper case coupled toan upper portion of the frame; a tray slidably installed on the frame,having a door, and adapted to carry a disk; a front panel coupled to afront end portion of the frame and having an aperture through which thetray passes; an air discharging passage between the frame and the frontpanel to discharge to an outside of the optical disk drive air and dustintroduced into the optical disk drive through a gap between the doorand the front panel; and a dust adsorbing filter attached to at leastone of a top surface of the tray, a bottom surface of the tray, and abottom surface of the upper case and adapted to adsorb and collect dustcontained in air flowing inside the optical disk.